Bump version to 1.8.0 for selective disclosure release

- Update version in project file to 1.8.0
- Add comprehensive changelog entry for selective disclosure features
- Document V3.0 metadata preservation and root hash consistency fixes

Author: lukepuplett

CHANGELOG.md

@@ -5,6 +5,30 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [1.8.0] - 2024-12-19
+
+### Added
+- **Selective Disclosure with V3.0 Metadata Preservation**: Enhanced `From` methods now properly preserve V3.0 header leaf during selective disclosure
+- **Flexible Metadata Detection**: New `IsMetadata` property on `MerkleLeaf` for flexible header detection
+- **Content Type Constants**: Added `V3_0_HEADER_CONTENT_TYPE` and `V3_0_HEADER_MIME_TYPE` constants to eliminate magic strings
+- **Root Hash Consistency**: Ensures root hash remains identical between source and selective disclosure trees
+
+### Fixed
+- **V3.0 Header Leaf Preservation**: Fixed issue where V3.0 metadata leaf salt was being regenerated during selective disclosure
+- **Cryptographic Integrity**: Selective disclosure trees now maintain exact same root hash as source tree
+- **Metadata Leaf Detection**: Improved header leaf detection to work with any version containing 'merkle-exchange-header'
+
+### Changed
+- **Enhanced Test Coverage**: Added comprehensive tests for V3.0 selective disclosure scenarios
+- **Improved Error Handling**: Better validation for empty trees without root
+- **Code Organization**: Moved content type constants to appropriate utility class
+
+### Technical Details
+- V3.0 header leaf is now preserved exactly as-is during selective disclosure
+- Root hash computation uses preserved header leaf instead of recreating it
+- Flexible metadata detection supports future version formats
+- Comprehensive test coverage ensures reliability across all scenarios
+
 ## [1.7.0] - 2024-12-19
 
 ### Added

src/Evoq.Blockchain/Evoq.Blockchain.csproj

@@ -4,7 +4,7 @@
     <TargetFramework>netstandard2.1</TargetFramework>
     <LangVersion>latest</LangVersion>
     <Nullable>enable</Nullable>
-    <Version>1.7.0</Version>
+    <Version>1.8.0</Version>
     <Authors>Luke Puplett</Authors>
     <Company>Evoq</Company>
     <Description>Blockchain utilities for .NET applications</Description>